<!DOCTYPE html>
<html>
    <head>
    	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
        <title>Hello World!</title>
    </head>
    <body>
        <h1>Hello world!</h1>
        需要登录成功才能到达此页面,userId:
        <div id=userId></div>
        <p>点击 <a href="/logout">logout</a> </p>
    </body>
</html>